No guess work at all - It would never get "new" fluid as the old fluid, at
the next pan drop, would already contaminated and your just adding new fluid
to old.
If you service the transmission on regular intervals, there really isn't a
problem with either method.
Now as to the original post on the Jeep 42RE - drop the pan, check/adjust
the bands, change the filter, and refill with ATF+4. Go from there...as it
was noted - if it's going to fail, it will (regardless of flusing or
fluid/filter changes). If all works after the fluid/filter change - drive
it a little while and then flush it.
- Bernd
-----Original Message-----
From: Barry Oliver [mailto:barrysuperhawk@insightbb.com]
Sent: Sunday, July 01, 2007 10:31 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: RE: When to change tranny fluid,or forget it.
So, for the anal among us, how many Changes does it take to get, say 90%
new fluid into the tranny? For example if I were to change my tranny
fluid [just the fluid] at my next 3 oil changes, how much good and how
much bad might I have? I realize this is a theoretical question
involving guesswork, but I am still wondering...
Bernd D. Ratsch wrote:
> Considering that you're only changing 5-6qts of a 16qt system...you still
> leave the dirty fluid in there and contaminate the new fluid. Either way
> can cause issues...it's not just flushing.
>
> - Bernd
>
> -----Original Message-----
> From: Steve Preston [mailto:steveophonic@yahoo.com]
> Sent: Sunday, July 01, 2007 6:24 PM
> To: dakota-truck@dakota-truck.net
> Subject: Re: DML: RE: When to change tranny fluid,or forget it.
>
>
> So you're saying if you flush the tranny,and it goes
> downhill,it was crap already? That makes sense to me!
>
> Thanks Brian!
>
> Steve P.
> --- Brian <hskr@san.rr.com> wrote:
>
>
>>Go ahead and change it. If it causes problems, then
>>it was going to fail
>>anyways. I've heard of flushing the tranny causing
>>problems, but never just
>>changing the fluid. Putting fresh fluid and filter
>>in should never cause
>>any problems.
>>
>>brian cropp
>>-----Original Message-----
>>From: owner-dakota-truck@bent.twistedbits.net
>>[mailto:owner-dakota-truck@bent.twistedbits.net] On
>>Behalf Of Steve Preston
>>Sent: Sunday, July 01, 2007 3:23 PM
>>To: dakota-truck@dakota-truck.net
>>Subject: DML: When to change tranny fluid,or forget
>>it.
>>
>>
>>I've heard this from several people over the years
>>and
>>Bernd also mentioned it recently,about it not
>>necessarily being a good idea to change fluid/filter
>>on high-mileage transmissions. My only question
>>is,at
>>one point should you just leave it (at what
>>mileage)?
>>Our 2000 Jeep GC has 80k on it,with the 42RE. We
>>bought it at 30k,and it probably never had
>>maintenance
>>done on the transmission. Once in a great while,it
>>will temporarily jump out of drive on sharp turns.
>>Fluid level seemed right when I checked it,but
>>apparently you're supposed to check it in what they
>>call "neutral"? :0
>>
>>My inclination is to change the filter,and fill it
>>with ATF+4,and that's what I'll do,unless someone
>>sets
>>me on a better path!
>>
>>Thanks,
>>
>>Steve P.
>>
>>
This archive was generated by hypermail 2b29 : Wed Aug 01 2007 - 00:15:21 EDT